I'm having some issues with an Intel Skylake HD 550 graphics card in my new Acer Aspire V3-372 laptop.

In the beginning installation of CentOS 7 failed: instead of the X desktop I only got a black screen.However, after putting "set gfxpayload=keep" into the grub.cfg everything works fine (except the graphics card).

The i915 module is loaded during startup but is not functional. Booting with"i915.preliminary_hw_support=1" in the commandline will start the graphics card. But it is running quite unstable withfrequent messages like "drm/i915: Resetting chip after gpu hang" or "[drm] GPU crash dump ...".Inserting all the i915 firmware files into the initramfs makes the stability much better.Failures even under heavy load are quite rare now and occur mostly when running on battery power.But switching to a console and back to the X desktop still doesn't work. The X desktop is shown for a fraction of asecond and then the computers hangs.

Now I put the latest firmware from https://01.org/linuxgraphics/downloads (Skylake GuC-6.1 and Skylake DMC-1.26)into the initramfs, too, but I don't know, if they actually get loaded and if something else is missing.

Does anybody know how to find out which firmware gets loaded during startup?I tried all sorts of debug but I couldn't find it out.

Thanks! I have downloaded CentOS-7-x86_64-DVD-1602-99.iso and will install it the next days.However, I don't see any differences to my current installation with 3.10.0-327.10.1.el7.x86_64 right now.Package linux-firmware-20150904-43.git6ebf5d5.el7.noarch.rpm is the same, too.

Unfortunately a fresh installation of CentOS-7-x86_64-DVD-1602-99.iso(GNOME-Desktop) didn't improve anything with my Intel Skylake HD550 graphics card.Module i915 is loaded at startup, but it is not functional.Doing an "rmmod i915" and then"modprobe -v i915 preliminary_hw_support=1"will switch screen resolution.Afterwards "rmmod i915" is not possible anymore, becaus it is in use.

After a normal boot there is only a black screen instead the X-desktop.